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Sprite 1984 - 1993
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Sprite 1984 - 1993.iso
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List_Init.c
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C/C++ Source or Header
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1990-11-27
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1KB
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52 lines
/*
* List_Init.c --
*
* Source code for the List_Init library procedure.
*
* Copyright 1988 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#ifndef lint
static char rcsid[] = "$Header: /sprite/src/lib/c/list/RCS/List_Init.c,v 1.3 90/11/27 11:05:41 ouster Exp $ SPRITE (Berkeley)";
#endif not lint
#include <stdio.h>
#include "list.h"
extern void panic();
/*
* ----------------------------------------------------------------------------
*
* List_Init --
*
* Initialize a header pointer to point to an empty list. The List_Links
* structure must already be allocated.
*
* Results:
* None.
*
* Side effects:
* The header's pointers are modified to point to itself.
*
* ----------------------------------------------------------------------------
*/
void
List_Init(headerPtr)
register List_Links *headerPtr; /* Pointer to a List_Links structure
to be header */
{
if (headerPtr == (List_Links *) NIL || !headerPtr) {
panic("List_Init: invalid header pointer.\n");
}
headerPtr->nextPtr = headerPtr;
headerPtr->prevPtr = headerPtr;
}